Pertanyaan

Hitunglah pH buffer asam berikut ini (sebelum dan sesudah penambahan 1 mL HCl 0,1 M) 100 mL larutan CH 3 COOH 0 , 2 M + 50 mL larutan KOH + 4 m u 0 , 1 M ( K a CH 3 COOH = 1 0 − 5 )

Hitunglah pH buffer asam berikut ini (sebelum dan sesudah penambahan 1 mL HCl 0,1 M) 100 mL larutan $CH_{3} COOH 0, 2 M$ + 50 mL larutan $KOH + 4 m u 0, 1 M$ $(K_{a} CH_{3} COOH = 1 0^{- 5})$ $\;\;\;$

M. Juliana

Master Teacher

Mahasiswa/Alumni Universitas Negeri Medan

Jawaban terverifikasi

Jawaban

pH buffer asam sebelum dan sesudah penambahan 1 mL HCl 0,1 M secara berturut-turut adalah .

pH buffer asam sebelum dan sesudah penambahan 1 mL HCl 0,1 M secara berturut-turut adalah 5 minus sign log space 3 space dan space 5 minus sign space log space 3 comma 08

5 minus sign log space 3 space dan space 5 minus sign space log space 3 comma 08

Pembahasan

pH buffer sebelum penambahan 1 mL HCl 0,1 M pH buffer sesudah penambahan 1 mL HCl 0,1 M Jadi, pH buffer asam sebelum dan sesudah penambahan 1 mL HCl 0,1 M secara berturut-turut adalah .

pH buffer sebelum penambahan 1 mL HCl 0,1 M

$space space space space space space space space C H subscript 3 C O O H space space space space plus space space space space space space space K O H space space space space space space space space rightwards arrow thin space space C H subscript 3 C O O K space space space plus space space space space H subscript 2 O space space space space 100 space mL cross times 0 comma 2 space M space space space space 50 space mL cross times 0 comma 1 space M space space space space space space space space space space space space space space minus sign space space space space space space space space space space space space space space space space space space minus sign M space space space space space space 20 space mmol space space space space space space space space space space space space space space space 5 space mmol space space space space space space space space space space space space space space space space space space space space minus sign space space space space space space space space space space space space space space space space space space minus sign bottom enclose R space space space space minus sign 5 space mmol space space space space space space space space space space space space space minus sign 5 space mmol space space space space space space space space space space space space plus 5 space mmol space space space space space space plus 5 space mmol end enclose S space space space space space space 15 space mmol space space space space space space space space space space space space space space space space space space space space minus sign space space space space space space space space space space space space space space space space space space space space 5 space mmol space space space space space space space space space 5 space mmol space space space space open square brackets H to the power of plus sign close square brackets double bond K subscript a cross times fraction numerator n space C H subscript 3 C O O H over denominator n space C H subscript 3 C O O K end fraction open square brackets H to the power of plus sign close square brackets equals 10 to the power of negative sign 5 end exponent cross times fraction numerator 15 space mmol over denominator 5 space mmol end fraction open square brackets H to the power of plus sign close square brackets equals 3 cross times 10 to the power of negative sign 5 end exponent space M pH equals minus sign space log space open square brackets H to the power of plus sign close square brackets pH equals minus sign log space left parenthesis 3 cross times 10 to the power of negative sign 5 end exponent right parenthesis pH equals 5 minus sign log space 3$
pH buffer sesudah penambahan 1 mL HCl 0,1 M

$space space space space space space space space C H subscript 3 C O O K space space space space plus space space space space space space space H Cl space space space space space space space space rightwards arrow thin space space C H subscript 3 C O O H space space space plus space space space space K Cl space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space 1 space mL cross times 0 comma 1 space M M space space space space space space space 5 space mmol space space space space space space space space space space space space space 0 comma 1 space mmol space space space space space space space space space space space space 15 space mmol space space space space space space space space space space space space space space minus sign bottom enclose R space space minus sign 0 comma 1 space mmol space space space space space space space space space minus sign 0 comma 1 space mmol space space space space space space space space plus 0 comma 1 space mmol space space space space space plus 0 comma 1 space mmol end enclose S space space space space space space 4 comma 9 space mmol space space space space space space space space space space space space space space space space space minus sign space space space space space space space space space space space space space space space space 15 comma 1 space mmol space space space space space space space space 0 comma 1 space mmol space space space space open square brackets H to the power of plus sign close square brackets double bond K subscript a cross times fraction numerator n space C H subscript 3 C O O H over denominator n space C H subscript 3 C O O K end fraction open square brackets H to the power of plus sign close square brackets equals 10 to the power of negative sign 5 end exponent cross times fraction numerator 15 comma 1 space mmol over denominator 4 comma 9 space mmol end fraction open square brackets H to the power of plus sign close square brackets equals 3 comma 08 cross times 10 to the power of negative sign 5 end exponent space M pH equals minus sign space log space open square brackets H to the power of plus sign close square brackets pH equals minus sign log space left parenthesis 3 comma 08 cross times 10 to the power of negative sign 5 end exponent right parenthesis pH equals 5 minus sign log space 3 comma 08$

Jadi, pH buffer asam sebelum dan sesudah penambahan 1 mL HCl 0,1 M secara berturut-turut adalah .

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